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English definition of “failure”

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failure

noun  /ˈfeɪl·jər/ us  

failure noun (LACK OF SUCCESS)

[C/U] a lack of success in doing something: [U] Their attempt to sail across the Atlantic Ocean ended in failure. [C] He was a failure as a businessman.

failure noun (SOMETHING NOT DONE)

[U] the fact of not doing something you should have done: [+ to infinitive] His failure to return her phone call told her that something was wrong.

failure noun (SOMETHING NOT WORKING)

[C/U] the fact of something not working as it should: [U] He died of heart failure. [C] The new computer system was a complete failure (= It did not work).
(Definition of failure from the Cambridge Academic Content Dictionary © Cambridge University Press)
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